Alright, let's work through 2509 times 3390 step by step
2509 × 3390 = 3390 × (2509)
+ 3390 × 9 what gives us 30510
+ 3390 × 00 that results in 0
+ 3390 × 500 that equals 1695000
+ 3390 × 2000 yielding 6780000

= 8505510
